Impact of Microplastics on Marine Invertebrates: A Toxicological Assessment

Abstract

Worries about the ecological and toxicological effects of microplastics have grown in response to their alarming proliferation in marine environments, especially among the invertebrates that are essential to aquatic food webs. the effects of microplastics on several invertebrate species in the ocean, including mollusks, crustaceans, echinoderms, and cnidarians, based on current scientific data and observations from the field. Filter feeders and deposit feeders are able to easily consume microplastics because of their tiny size and persistence, which causes bioaccumulation and trophic transmission. Physical obstructions, decreased feeding efficiency, and poor energy allocation are some of the negative effects they can have after consumed, which can have a knock-on effect on development, offspring, and survival rates. Exposure to microplastics can cause oxidative stress, inflammatory reactions, disturbance of the endocrine system, and genotoxicity in organisms because they serve as vectors for harmful additives and adsorbed contaminants such persistent organic compounds and heavy metals. Vulnerability is mostly determined by species-specific feeding tactics and physiological features, according to comparative investigations. Zooplankton and bivalves are especially vulnerable. alterations in behavior, changes in enzyme activity, and inhibition of the immune system are examples of sublethal consequences that could jeopardize ecosystem functioning and population stability. This review highlights the critical need for standardized testing techniques, better monitoring of microplastic contamination, and the incorporation of ecotoxicological data into marine management plans by combining toxicological findings across taxa. The results add to the increasing amount of evidence that microplastics are more than just pollutants; they are new toxicological stressors that threaten marine biodiversity and the longevity of ocean ecosystems.